
Chickens have fleshy red flaps called wattles that hang below their beaks. Wattles always come in pairs, with one on each side of the beak. They vary in shape and size depending on the breed. Wattles are believed to help chickens regulate body temperature, act as a health indicator, and make a chicken more attractive to potential mates.
| Characteristics | Values |
|---|---|
| Purpose | Help with body temperature control, act as a health indicator, and make a chicken more attractive for mating |
| Location | Fleshy skin that hangs below a chicken's beak |
| Shape | Wattles come in pairs and hang on either side of the beak. They vary in shape and size depending on the chicken's breed. Some chickens have long, oblong-shaped wattles, while others have shorter, more rounded ones. |
| Size | Roosters have larger and longer wattles than hens of the same breed. |
| Exceptions | Bearded chicken breeds, or chickens with feathers below their beaks, often lack wattles or have very small wattles. Faverolle chickens, Silkies, and bearded-Polish chickens are breeds that have little to no wattles. |
| Health indicator | A healthy wattle should be large, glossy, soft, waxy, and smooth rather than shrivelled or dry. |
| Mating | The size of the wattles is related to testosterone. Size, therefore, is an indication of social status. |
| Other functions | In umbrellabirds, the wattle serves to amplify the birds' calls. |
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What You'll Learn

Wattles help chickens regulate body temperature
Wattles are fleshy flaps of skin that hang on either side of a chicken's throat, just below the beak. They are rich in blood vessels and help chickens regulate their body temperature. Chickens do not sweat, so they rely on their wattles and combs to cool themselves down. During hot weather, blood circulates through the tiny capillaries inside the comb and wattle, allowing overheated blood to circulate and cool down before returning to the rest of the body. This process helps the chicken to lower its body temperature.
The comb and wattles are larger in roosters than in hens. The size of a rooster's comb and wattles is related to its testosterone levels, with larger combs and wattles indicating higher testosterone levels. In addition to their role in thermoregulation, the comb and wattles also play a role in attracting mates. Roosters use their comb and wattles to gain the attention of hens during a behaviour called "tidbitting", where they make high-pitched sounds and perform rhythmic movements with their head and neck. The rapid swinging of the wattles during this display may help to attract hens by increasing the apparent size of the rooster's head.
The colour and appearance of a chicken's comb and wattles can also provide valuable information about its health and egg-laying capabilities. A bright, vibrant, and full comb and wattle typically indicate good health, while a pale, discoloured, or flaky comb and wattle may be a sign of illness. In addition, a bright comb in a laying hen can indicate that she is healthy and producing eggs, while a pale comb may suggest that she is not currently laying. Black combs indicate frostbite, purple combs indicate circulation problems, and a white comb could be a sign of internal bleeding or anaemia.
The comb and wattles are also important in indicating a chicken's social status within the flock. When a rooster loses rank in the pecking order, its comb and wattles shrink in size. Additionally, the comb and wattles can be used to determine the breed and gender of a chicken, as they vary in shape, size, and colour depending on these factors.
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They are used to attract mates
Wattles are two thin, flexible flaps of skin that hang beneath a chicken's beak. They are usually found in pairs, one on each side of the beak, although they can sometimes occur as a single structure, in which case they are known as a dewlap. Wattles are generally larger in roosters than in hens of the same breed, and they can vary in shape and size depending on the chicken's breed. For example, some chickens have long, oblong-shaped wattles, while others have shorter, more rounded ones. Bearded chicken breeds, or those with feathers below their beaks, often lack wattles or have very small ones that are barely distinguishable among the beard feathers.
One purpose of a chicken's wattle is to attract potential mates. Larger wattles in roosters are considered more appealing to hens. This is because large wattles are correlated with high testosterone levels, good nutrition, and the ability to evade predators, indicating a potentially successful mate. The size of a rooster's comb and wattles is related to its testosterone levels, with the biggest, brightest combs and wattles indicating higher social status.
In addition to their role in sexual attraction, wattles also help regulate a chicken's body temperature. They are packed with blood vessels that assist in cooling the chicken down during hot weather. Blood circulating from the comb to the wattles helps to lower the chicken's temperature. Conversely, in cold weather, blood flow to the comb and wattles decreases to minimize the escape of body heat.
The appearance of a chicken's wattles can also provide insights into its health. Healthy wattles should be smooth, glossy, soft, and waxy, while an unhealthy wattle may appear shrivelled, dry, or discoloured. Wattles with white patches of flaking skin or black spots can indicate frostbite, and purple colouring may suggest circulation problems.
Furthermore, wattles may play a role in amplifying a chicken's calls. For example, during the tidbitting display performed by roosters to attract hens for mating, the rapid swinging of the wattles increases the apparent size of the rooster's head, potentially enhancing the visual impact of the performance.
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Wattles indicate a chicken's health
Wattles are two thin, flexible flaps of skin that hang under a chicken's beak. They are generally paired structures and are more obvious in roosters (cockerels) than in hens. Wattles are larger in roosters and are an indication of their health and social status.
The colour and texture of a chicken's wattles can indicate its health. Healthy wattles are smooth, glossy, firm and rubbery, and of a bright, even colour. Unhealthy wattles are dry, shrivelled, flaky, or pale or discoloured. Wattles with white or black spots can indicate frostbite, while purple colouring or dark tips may indicate a circulatory problem.
The size of a chicken's wattles can also indicate its health. Roosters have larger wattles than hens, and within the same breed, roosters with larger wattles have higher testosterone levels and are considered more attractive to hens. Wattles can change size throughout a chicken's life, becoming smaller during summer and winter when daylight hours drop. During the fall molt or shorter winter days, hens' wattles may become smaller, indicating that they have stopped laying.
In addition to indicating health, wattles also help regulate a chicken's body temperature. Blood circulates through the wattles, helping the chicken cool down during hot weather and minimizing the escape of body heat during winter. Thus, larger wattles are better at cooling the chicken, while smaller wattles help retain body heat.
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They are an indicator of sexual maturity
Wattles are fleshy flaps of skin that hang on either side of a chicken's throat, just below the beak. They are one of the three main fleshy parts found on a chicken's head, the other two being the comb and earlobes. Wattles are generally paired structures, but they can also occur as a single structure, in which case they are sometimes known as a dewlap.
One of the primary functions of a chicken's wattle is to indicate sexual maturity. When a young rooster reaches the age of 4 to 6 weeks, its comb and wattles become more conspicuous than those of a same-age hen of the same breed. This is because the comb and wattles of a rooster are directly related to its testosterone levels. As a rooster matures and its testosterone levels rise, its comb and wattles become larger and more colourful. This is an indication that the rooster is sexually mature and ready to mate.
The size and colour of a rooster's comb and wattles are important indicators of its social status within a flock. The largest and most colourful combs and wattles belong to the highest-ranking rooster, with lower-ranking roosters having smaller and less colourful features. This is because testosterone levels are directly linked to social status in chickens, and the size and colour of the comb and wattles reflect these testosterone levels.
In addition to indicating social status, the comb and wattles of a rooster also play a role in attracting mates. Hens are attracted to roosters with larger and more colourful combs and wattles, as these features indicate good health and genetic fitness. Roosters may also engage in a behaviour called "tidbitting" to show off their wattles when they find food, which helps to attract hens as well.
The comb and wattles of a hen can also provide valuable information about her health and egg-laying capabilities. A healthy hen will have bright, plump combs and wattles, while an unhealthy hen may have pale, dry, or shrivelled features. Additionally, the appearance of wattles on a young hen can indicate that she is about to begin laying eggs, as the development of wattles is linked to the onset of sexual maturity.
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Wattles are associated with genes coding for disease resistance
Wattles are fleshy flaps of skin that hang on either side of a chicken's throat, just behind the beak. They are more obvious in roosters, who use them for courting. Roosters perform a routine called "tidbitting" to attract hens for mating, and the rapid swinging of their wattles during this routine is thought to draw the hen's attention. The size of a rooster's wattles is related to testosterone levels, nutrition, and the ability to evade predators, indicating a potentially successful mate.
In addition to their role in courtship, wattles also help cool chickens down. Blood circulating from the comb to the wattles is cooled, helping to lower the chicken's temperature during hot weather.
Now, let's discuss the relationship between wattles and disease resistance. Ornamental organs such as wattles have been associated with genes coding for disease resistance. While wattles themselves may not directly contribute to disease resistance, the presence of certain genes associated with ornamental features may also be linked to improved immunity.
Genes such as MHC (Major Histocompatibility Complex) genes, the Nramp1 (Natural Resistance-Associated Macrophage Protein 1) gene, IFN (Interferon) genes, Mx (Myxovirus-resistance) genes, anti-ALV (Avian Leucosis Virus) genes, and the Zyxin gene have been linked to disease resistance in poultry. By understanding these genetic markers of disease resistance, scientists can develop more resistant commercial poultry flocks or improve vaccines against various diseases.
Breeding programs can utilize this knowledge to enhance the immune response in chickens, thereby increasing disease resistance and reducing the need for drugs and antibiotics. This approach is particularly valuable in the poultry industry, which is susceptible to various infectious diseases that cause economic losses, such as Salmonella, Avian Influenza, and Colibacillosis.
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Frequently asked questions
Wattles are fleshy flaps of skin that hang on either side of a chicken's throat, starting just behind the beak.
Wattles help chickens regulate their body temperature. They are rich in blood vessels, allowing overheated blood to circulate and cool down before returning to the rest of the body.
Yes, wattles can help attract mates. Roosters use their wattles and combs to catch the attention of hens. Wattles may also be used to indicate a chicken's health and egg-laying capabilities.
Yes, wattles come in different shapes and sizes depending on the breed. Some chickens have long, oblong-shaped wattles, while others have short, rounded wattles. Bearded chicken breeds often lack wattles or have very small ones.
Combs are fleshy growths that sit on top of a chicken's head, while wattles are the fleshy skin that hangs below the beak. Combs are usually larger in males than in females and are used to indicate sexual maturity.























